GF82.90-P-0001T Multifunction Steering Wheel Function

GF82.90-P-0001T Multifunction Steering Wheel Function

15.03.07 The document has been updated to this date and will no longer be subject to revision.

Component Identification:

Function conditions:
^ Circuit 15 ON
^ Circuit 15R ON

The multifunction steering wheel (MFL) serves to increase active driving safety in road traffic in combination with the instrument cluster (A1).
The driver can concentrate on the traffic without distraction when controlling and operating various vehicle components (e.g. radio, telephone). The MFL allows the driver to operate and interrogate the following systems:
^ Radio
^ COMAND
^ Navigation
^ Distronic
^ Trip computer
^ ASSYST
^ Telematics/E-Call (USA)
^ Telephone
^ Tire pressure monitor (TPM)

The selected main system is displayed in the multifunction display (A1p13) of the instrument cluster (A1).
In addition, the fanfare horns (H2) can be actuated by means of the impact plate of the MFL.

When changing the display level, the start image of the selected level is always displayed and not the submenu that was last selected in this display.

Task of the left multifunction steering wheel button group (S110)
The system selection button (S110s3) and scroll forward/back button (S110s1) are included in the left multifunction steering wheel button group (S110).
Each of the systems can be called with the system selection button (S110s3). It is possible to "scroll" forward and backward in the systems. It is also possible to "scroll" forward and backward with the scroll forward/back button (S110s1) in a system, i.e additional submenus can be called up.

Task of the right multifunction steering wheel button group (S111)
The right-hand button group for the multifunction steering wheel (S111) contains the button for accepting and terminating a telephone call (S111s3), and the + and - buttons, which are used to set specific functions and for the volume control (S111s1). A telephone call can be accepted or terminated with the accept/ terminate phone call button (S111s3).

The volume for the system currently active can be adjusted with the button + and -, setting of specific functions and volume control (S111s1). In addition, for example, in the "Settings" system, the OFF delay time of the interior light can be extended (+) or shortened (-) .

Transfer of signals
The control signals are transmitted voltage-coded to the steering column module (N80) via the fanfare horns and airbag clock spring contact (A45).
Starting with the steering column module (N80), the transmission takes place via the Controller Area Network Bus Class B (interior) (CAN-B).